Can A Sytist Gallery Slide Show Go Full Screen?

As the title asks. In a gallery where purchasing options are important (so, using the 'thumbnail' display option) the purchasing options are shown along the right side of the screen when watching a slide show. Can the sidebar be hidden while the show is playing?

I thought of just switching the display temporarily but going to a 'slide show' display option can't seem to access the sub galleries (all sub galleries vanish from the main gallery page) so that doesn't help me when trying to show off a wedding.